The paragraphs about it did note that it was a terrible battle, but since the book was called "The Hobbit", and Bilbo was knocked out for most of it, there wasn't much detail. I was okay with the battle being expounded upon, especially seeing that the series has a LOT less emphasis on Bilbo (which is very stupid), but it was pretty long and badly paced. I did LOL when the tide turned with an extra 13 dwarves. Unless they all have mithril axes and armor, it's not gonna do a whole lot.
I was happy when The Hobbit was announced, directed by Del Toro, and in two movies, especially with appendix content added. Very disappointed when it was moved to Jackson, drawn out to three movies, and left Azog in, who didn't last a page in the ROTK appendicies. Also, the
Dol Guldur timeline was incorrect, and the addition of Gundabad was dumb/rather pointless.
I will still hold that the second installment was by far the worst. It made for a very poorly paced trilogy.